I’ve owned and driven V-8 Mustangs going back 30+ years and currently have a highly modified ‘03 Cobra. It’s totally different with toys that aren’t driven often, which benefit from a performance exhaust, vs. a daily driver that is loud for no reason. A nice rumble is fine, but obnoxious is pointless, especially with the ST. As I discovered with the H-pipe/Gibson combo, it was annoying (probably similar to the MBRP kit), but exhaust sounds are always subjective. Having stock components with just the new axle-back is perfect in my book. To each his own.
How was the interior noise/drone with just the h pipe? I'm debating swapping out the mrt with the mbrp now.